package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 统计指定时间区内的营业额数据
     * @param begin
     * @param end
     * @return
     */

    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //计算日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //封装营业额数据
        List<Double> turnoverList = new ArrayList<>();
        for(LocalDate date: dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);

            Double turnover = orderMapper.sunByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }


    /**
     * 统计指定时间区间内的用户数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //存日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList = new ArrayList<>();
        //select count(id) from user where creat_time &lt; begin
        List<Integer> totalUserList = new ArrayList<>();
        //select count(id) from user where creat_time &gt; begin and creat_time &lt; end;

//存用户
        for(LocalDate localDate: dateList){
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end",endTime);

            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);

        }




        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    /**
     * 统计指定时间区间内的订单数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        //存日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的订单数
        List<Integer> orderCountList = new ArrayList<>();
        //存放每天的有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();

        //查询每天的有效订单数和订单总数
        for(LocalDate date: dateList){
            LocalDateTime beginTime =LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime =LocalDateTime.of(date,LocalTime.MAX);
            //存放每天的订单数
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            //存放每天的有效订单数
            Integer validOrderCount = getOrderCount(beginTime,endTime,Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);

        }
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate =0.0;
        if(totalOrderCount != 0){
            orderCompletionRate = validOrderCount.doubleValue()/totalOrderCount;

        }

        return OrderReportVO.builder()
                .orderCountList(StringUtils.join(orderCountList,","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(totalOrderCount)
                .dateList(StringUtils.join(dateList,","))
                .validOrderCount(validOrderCount)
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .build();
    }
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return orderMapper.countByMap(map);

    }
    /**
     * 统计指定时间区间内的销量排名前10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime =LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime =LocalDateTime.of(end,LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());

        String nameList = StringUtils.join(names,",");
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }
    /**
     * 导出运营数据报表
     * @param response
     */
   public void exportBusinessData(HttpServletResponse response) {
        //查询数据库
        LocalDate datebegin = LocalDate.now().minusDays(30);
        LocalDate dateend = LocalDate.now().minusDays(1);
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(datebegin, LocalTime.MIN), LocalDateTime.of(dateend, LocalTime.MAX));
        //将数据导入excel
       InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
       try {
           //基于模板创建一个新的excel文件
           XSSFWorkbook excel = new XSSFWorkbook(inputStream);
           //填充数据
           XSSFSheet sheet = excel.getSheet("Sheet1");
           //填充时间
           sheet.getRow(1).getCell(1)
                   .setCellValue("时间"+datebegin+"至"+dateend);
           XSSFRow row = sheet.getRow(3);
           row.getCell(2).setCellValue(businessData.getTurnover());
           row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
           row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
           row.getCell(2).setCellValue(businessData.getValidOrderCount());
           row.getCell(4).setCellValue(businessData.getUnitPrice());

           //填充明细数据
           for(int i=0 ; i<30;i++){
               LocalDate date = datebegin.plusDays(i);
               BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

               row = sheet.getRow(i + 7);
               row.getCell(1).setCellValue(date.toString());
               row.getCell(2).setCellValue(businessData1.getTurnover());
               row.getCell(3).setCellValue(businessData1.getValidOrderCount());
               row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
               row.getCell(5).setCellValue(businessData1.getUnitPrice());
               row.getCell(6).setCellValue(businessData1.getNewUsers());

           }
           //下载
           ServletOutputStream out = response.getOutputStream();
           excel.write(out);

           //关闭
           out.close();
           excel.close();
       } catch (IOException e) {
           e.printStackTrace();
       }
   }
}
